Rated 5 out of 5 stars

agunchan's fork:
http://fxthunder.com/blog/archives/2866
https://github.com/agunchan/autoproxy
http://pan.baidu.com/s/1ntuLNIT#dir/path=%2FFirefox%2FAutoProxyMod
https://code.google.com/p/xthunder/downloads/list